Tomographic Characterization of Non-Hermitian Hamiltonians in Reciprocal Space
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The paper develops a programmable photonic method for tomographically characterizing non-Hermitian Hamiltonians in reciprocal space, directly matching experimental reconstruction of non-Hermitian spectra and topology.
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Author(s): Francesco Di Colandrea, Fabrizio Pavan, Sarvesh Bansal, Paola Savarese, Grazia Di Bello, Giulio De Filippis, Carmine Antonio Perroni, Donato Farina, and Filippo Cardano Non-Hermitian Hamiltonians enrich quantum physics by extending conventional phase diagrams, enabling novel topological phenomena, and realizing exceptional points with applications in quantum sensing. Here, we present a programmable liquid-crystal-based photonic platform for implementing nonunitary … [Phys. Rev. Lett. 137, 126603] Published Tue Sep 15, 2026